<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.9.2"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>GrPPI: reduce.h Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr style="height: 56px;">
  <td id="projectlogo"><img alt="Logo" src="logo.svg"/></td>
  <td id="projectalign" style="padding-left: 0.5em;">
   <div id="projectname">GrPPI
   &#160;<span id="projectnumber">1.0</span>
   </div>
   <div id="projectbrief">Generic and Reusable Parallel Pattern Interface</div>
  </td>
 </tr>
 </tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.9.2 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
var searchBox = new SearchBox("searchBox", "search",false,'Search','.html');
/* @license-end */
</script>
<script type="text/javascript" src="menudata.js"></script>
<script type="text/javascript" src="menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
$(function() {
  initMenu('',true,false,'search.php','Search');
  $(document).ready(function() { init_search(); });
});
/* @license-end */</script>
<div id="main-nav"></div>
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
     onmouseover="return searchBox.OnSearchSelectShow()"
     onmouseout="return searchBox.OnSearchSelectHide()"
     onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>

<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0" 
        name="MSearchResults" id="MSearchResults">
</iframe>
</div>

<div id="nav-path" class="navpath">
  <ul>
<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li>  </ul>
</div>
</div><!-- top -->
<div class="header">
  <div class="headertitle">
<div class="title">reduce.h</div>  </div>
</div><!--header-->
<div class="contents">
<a href="reduce_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright 2018 Universidad Carlos III de Madrid</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * you may not use this file except in compliance with the License.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *     http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#ifndef GRPPI_REDUCE_H </span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#define GRPPI_REDUCE_H</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160; </div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &lt;utility&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160; </div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="iterator__traits_8h.html">common/iterator_traits.h</a>&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="execution__traits_8h.html">common/execution_traits.h</a>&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160; </div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacegrppi.html">grppi</a> {</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160; </div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Execution, <span class="keyword">typename</span> InputIt, <span class="keyword">typename</span> Result, <span class="keyword">typename</span> Combiner,</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    requires_iterator&lt;InputIt&gt; = 0&gt;</div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="group__reduce__pattern.html#ga1666d960a2d79c46e209c7d64f0cdc7f">   50</a></span>&#160;<span class="keyword">auto</span> <a class="code" href="group__reduce__pattern.html#ga1666d960a2d79c46e209c7d64f0cdc7f">reduce</a>(<span class="keyword">const</span> Execution &amp; ex,</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;            InputIt first, std::size_t size,</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;            Result &amp;&amp; identity,</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;            Combiner &amp;&amp; combine_op)</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;{</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  static_assert(supports_reduce&lt;Execution&gt;(),</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;                <span class="stringliteral">&quot;reduce not supported on execution type&quot;</span>);</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment">//  static_assert(std::is_same&lt;Result,typename std::result_of&lt;Combiner(Result,Result)&gt;::type&gt;::value,</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment">//                &quot;reduce combiner should be homogeneous:T = op(T,T)&quot;);</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;  <span class="keywordflow">return</span> ex.reduce(first, size,</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                   std::forward&lt;Result&gt;(identity), std::forward&lt;Combiner&gt;(combine_op));</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;}</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160; </div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Execution, <span class="keyword">typename</span> InputIt, <span class="keyword">typename</span> Result, <span class="keyword">typename</span> Combiner,</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;          requires_iterator&lt;InputIt&gt; = 0&gt;</div>
<div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="group__reduce__pattern.html#ga062c46b9cb6362994ec9f24f15efa820">   79</a></span>&#160;<span class="keyword">auto</span> <a class="code" href="group__reduce__pattern.html#ga1666d960a2d79c46e209c7d64f0cdc7f">reduce</a>(<span class="keyword">const</span> Execution &amp; ex, </div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;            InputIt first, InputIt last, </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;            Result &amp;&amp; identity,</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;            Combiner &amp;&amp; combine_op)</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;{</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  static_assert(supports_reduce&lt;Execution&gt;(),</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;      <span class="stringliteral">&quot;reduce not supported on execution type&quot;</span>);</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="comment">//  static_assert(std::is_same&lt;Result,typename std::result_of&lt;Combiner(Result,Result)&gt;::type&gt;::value,</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="comment">//                &quot;reduce combiner should be homogeneous:T = op(T,T)&quot;);</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  <span class="keywordflow">return</span> ex.reduce(first, std::distance(first,last), </div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;      std::forward&lt;Result&gt;(identity), std::forward&lt;Combiner&gt;(combine_op));</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;}</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160; </div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;}</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160; </div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="aexecution__traits_8h_html"><div class="ttname"><a href="execution__traits_8h.html">execution_traits.h</a></div></div>
<div class="ttc" id="agroup__reduce__pattern_html_ga1666d960a2d79c46e209c7d64f0cdc7f"><div class="ttname"><a href="group__reduce__pattern.html#ga1666d960a2d79c46e209c7d64f0cdc7f">grppi::reduce</a></div><div class="ttdeci">auto reduce(const Execution &amp;ex, InputIt first, std::size_t size, Result &amp;&amp;identity, Combiner &amp;&amp;combine_op)</div><div class="ttdoc">Invoke Reduce pattern with identity value on a data sequence with sequential execution.</div><div class="ttdef"><b>Definition:</b> reduce.h:50</div></div>
<div class="ttc" id="aiterator__traits_8h_html"><div class="ttname"><a href="iterator__traits_8h.html">iterator_traits.h</a></div></div>
<div class="ttc" id="anamespacegrppi_html"><div class="ttname"><a href="namespacegrppi.html">grppi</a></div><div class="ttdef"><b>Definition:</b> callable_traits.h:21</div></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated by&#160;<a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.2
</small></address>
</body>
</html>
